Having a single lens to cover everything from ultrawide to strong telephoto is incredibly appealing, but how well do these extreme zooms perform in a variety of situations? We’ll show you where the trade-offs are.

The annual spring migration of shorebirds is an awesome phenomenon. Untold millions of them fly from wintering grounds all over the Americas to reach summer nesting grounds in the Arctic. As they cover distances spanning half the globe, their food demands are critical, and high-energy refueling stops are essential.